Improvement in sewing-machines



UNITED STATES PATENT OFFICE.

JOSEPH B. MCOIINE, OF HAMILTON, CANADA, ASSIGNOR TO RICHARD MOTT WANZER,OF SAME PLAGE.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 15 81,596, datedJanuary 12, 1875; application tiled June 29, 1874.

To al1- 'wltom t 'may concern:

Be it known that I, JosErH BURT McCUNE, of the city of Hamilton, in thecounty of Wentworth, in the Province of Ontario, Dominion of Canada,have-invented a certain new and useful Improvement in Sewing-Machines;and I do hereby declare that the following is 'a full, clear, and exactdescription of the construction and operation of the same.

The object of my invention is a very simple device for reversing thefeed of sewingmachines, enabling the operator to sew forward orbackward, producing the same length of stitch.

Figure l represents a partial view of a sewing-machine. Fig. 2 is aportion of a side view of the same, with the arm, cloth-plate, andshafts broken off.

A is the bed-plate of the machine. B is a bracket, fastened to the underside ofthe bedplate A, provided with two parallel slots, a a, with acentral opening between the said slots for a screw, d, to fasten thedisk-lever O to it. The peculiar form of the lever O is shown in the endview, Fig. l. Its right end is circular, and its extreme left end isflattened out, as a convenient handle for the operator. Its use will beshown hereinafter. It is also provided with two scroll-slots, c c,through which screws b b pass. They also pass through slots a c of theaforementioned bracket, and serve to keep the disk of the lever G in itsplace. D is a feed-lever, for the purpose of regulating the length ofthe stitch one Way. It has a pin, K, attached to its left side, said pinconstructed to slide in a groove of the swivel-block I. E is aconnecting-.rod passing from the shaft H to the swivel-block I, and acam on the shaft H imparts motion to the said rod and block. F is arocker-shaft. is an upward arm of the rocker-shaft G, connected with theswivel-block I. The View,

Fig. 1, shows how the rocker-arm G and connecting-rod E are connected tothe swivelblock. Iis a swivel-block, containing a groove,

in which slides the' pin K, which is attached to the lever D for thepurpose of regulating' the length of the stitch. t' is a small pin,fastened to the lever D, Fig. 2, immediately under the bracket B, forthe purpose of a stop for the lever D. Its action is confined betweenblocks e e. (Shown in Fig. 2.) The sliding blocks e c are made to beadjusted near to, or distant from, each other by means of thescroll-slots and screws b b of the disk' of the lever C, and the spacebetween the said blocks is expanded or contracted as the handle or leverC is raised or lowered. J is a conmeeting-rod from the drive-wheel Ltothe rocker-shaft F. K is the pin which is attached to the lever D, theoutward end of which is made to t in the groove of the swivelblock I.

The operation of my device is as follows: By having the pin K in thegroove ofthe swivel-block I, below the center of the point G', Fig. l,the feed moves the cloth from .the operator 5 and, when the said piu Kisabove the center of the swivel-block, the feed will be reversed, and thecloth will be fed toward the operator.- The operation of the slottedleverL C and sliding blocks c e is to form adjustable stops for the pint', said pin being firmly attached to the lever D, so that the feed isreversed. My devices enable an operator to sew backward or forward, andfasten the ends of the seams without stoppingthc machine and turning thecloth around. What I claim is The slotted disk-lever O and movableblocks c e, combined with the feed-regulating lever D, having pins iandk, all operating substantially as and for the purpose specied.

Dated at Hamilton, Canada, this 30th day of May, A. D. 1874.

JOSEPH BURT MOCUNE. Signed in the presence of- WM. BRUCE, P. L. ScRIvEN.

